Hi,
2 parts for twist grip to early M20 and other BSA from the 30's wanted
The parts are the clip and the roller that shown on the image on this link:
http://www.mcveteranerna.se/2018/04/03/delar-till-gashandtag-bsa-30-tal-39331023
email (option): robert_c@hotmail.com
Regards
Robert